Structure 35C0078 · San Mateo County, CA

Spruce AVE over Colma Creek

Carries Spruce AVE over Colma Creek, North Of South Art Canal.

Overall conditionPoor

Set by its lowest-rated component: Deck and Superstructure at 4 of 9.

How ratings work
Decksets the rating4/9 · Poor
Superstructuresets the rating4/9 · Poor
Substructure7/9 · Good
Channelnot part of overall6/9 · Satisfactory
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
CAR · 15 FT74 FT OVERALL25 FT0ELEVATION · LENGTHS TO SCALE
Deck 4/9 · sets the ratingSuperstructure 4/9 · sets the ratingSubstructure 7/9

74 ft end to end, longest span 40 ft. Lengths and the car on the deck are drawn to the same scale. Each part is colored by its latest inspection rating. The inventory records lengths but not heights or the layout of the shorter spans, so those are drawn as typical for a slab bridge.

Built197551 years old
Length74.1 ft22.6 m
Daily traffic17,332counted 2010
Last inspectedApril 2023every 24 months

Location

StateCalifornia
CountySan Mateo
LocationNorth Of South Art Canal
CarriesSpruce AVE
CrossesColma Creek
Coordinates37.65133, -122.41771

Physical Characteristics

MaterialConcrete Continuous
DesignSlab
Total Length74.1 ft (22.6 m)
Max Span40.0 ft (12.2 m)
Deck Width67.9 ft (20.7 m)
Deck Area467.8 sq m
Main Spans2
Year Built1975

Traffic

Avg Daily Traffic17,332 (2010)
Truck Traffic15%
Lanes On Bridge5

Inspection & Ownership

Last InspectionApril 2023
Inspection FrequencyEvery 24 months
OwnerCity/Municipal Highway Agency
Historical SignificanceBridge is not eligible for the National Register
Scour Critical8 — Stable, low risk
Structure Number35C0078

How Bridge Ratings Work

Inspectors rate each major part of a bridge (the deck you drive on, the superstructure of beams that holds it up, and the substructure of piers and abutments beneath) on a 0–9 scale. A bridge's overall condition is its lowest of those ratings, so one deteriorated component makes the whole bridge "poor."

0Failed
1Imminent failure
2Critical
3Serious
4Poor
5Fair
6Satisfactory
7Good
8Very good
9Excellent
Good · lowest component 7–9
Fair · lowest component 5–6
Poor · lowest component 0–4

A poor rating is not a closure. It means the bridge is flagged for priority repair or replacement; bridges judged unsafe are closed or posted with weight limits. The waterway (channel) rating is reported, but it does not count toward the overall classification.

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